After the eleventh year of age, the first cause of death among school children is tuberculosis. The chief aim of the author has been to show the child the sure way of preventing this disease and others of like nature, and to establish an undying faith in the motto of Pasteur, "It is within the power of man to rid himself of every parasitic disease." Nearly all of the illustrations used are from photographs and drawings specially prepared for this book. These, together with the large amount of material gleaned from original sources and from the author's experiments in the laboratory, will, it is hoped, make this little volume worthy of the same generous welcome accorded the two earlier books of this series. CONTENTS CHAPTER PAGE I. CARING FOR THE HEALTH 9 II. PARTS OF THE BODY 15 III. FEEDING THE BODY 21 IV. FOOD AND HEALTH 30 V. HOW PLANTS SOUR OR SPOIL FOOD 36 VI. MILK MAY BE A FOOD OR A POISON 41 VII. HOW THE BODY USES FOOD 47 VIII. THE CARE OF THE MOUTH 60 IX. ALCOHOLIC DRINKS 68 X. ALCOHOL AND HEALTH 74 XI. TOBACCO AND THE DRUGS WHICH INJURE THE HEALTH 78 XII. THE SKIN AND BATHING 85 XIII. CLOTHING AND HOW TO USE IT 94 XIV. BREATHING 100 XV. FRESH AIR AND HEALTH 111 XVI. THE BLOOD AND HOW IT FLOWS THROUGH THE BODY 117 XVII. INSECTS AND HEALTH 127 XVIII. HOW THE BODY MOVES 135 XIX. THE MUSCLES AND HEALTH 144 XX. HOW THE BODY IS GOVERNED 149 XXI. HOW NARCOTICS AND STIMULANTS AFFECT THE BRAIN AND NERVES 158 XXII. THE SENSES, OR DOORS OF KNOWLEDGE 165 XXIII. KEEPING AWAY SICKNESS 174 XXIV. HELPING BEFORE THE DOCTOR COMES 183 INDEX 189 HEALTH LESSONS CHAPTER I CARING FOR THE HEALTH